Bobbin and bobbin clutching spindle



March 14, 1933; w. l. STIMPSON 1,901,538

BOBBIN A ND BOBBIN CLUTCHING SPINDLE Filed Feb. 23, 1932 W/T/VEJS.INVENTOR.

C 4 //v7'o/v 6. Cosue/v. MLLA cE I ST/MPSON.

ATTORNEY.

amend Mar. 4, 193:

T UNITED STATES PATENT orrlca wmacn I. s'rmaon, or nomna,xas'aacausar'rs, asarcxoa no human. coarona'nor, or non-mu, nssacmrsms,a conroaa'rrox or ma mum AND 3033]] OLUTCHING SPIHDLE- Application filedFebruary es, mi. lerial No. 594,848.

This invention relates to that type of spinning apparatus in which arotatable spindle having a plurality of centrifugall -act1ng clutchsegments is employed. In t is type a of apparatus the rotation of thebobbin with the spindle is secured by the radial pressure of the clutchsegments against the wall of ,the bore in the butt of the bobbin. Ascommonly constructed, there is nothing to prevent the bobbin from risinvertically on the spindle except the friction tween the clutch segmentsand the said wall. It frequently happens that the top of the bobbinbecomes worn enough to be slightly loose on the spindle, or the bobbinbecomes unbalanced dynamically. In either event, the stresses set up atthe extremely high speeds at which the bobbins and spindles are rotatedare sufficient to cause the to of the spindle to be pulled out of linean to rotate bodily in a more or less circular ath. When this ha pens,uite an appreciable component of 't e centri gal force set up tends tolift the bobbin vertically ofi the spindle, and the aforementionedfriction is insuflicient to keep the bobbin down in place. Of course, if,the.

bobbin rises, even slightly, during the spinning operation a uniformtraverse is not produced, and the particular package of yarn is rendereddefective. Accordingly, the object of the present invention is toprovide a construction in'which the bobbin will be firmly held againstrising on the spindle.

In my prior Patent 758,715, granted May 3, 1904, I disclosed aconstruction intended to prevent bobbins from rising on the spindles, bymerely making the bore in the butt of the o bobbin tapered. However,such" construction was not satisfactory and it has. never been used,partly because the tapered bore cannot be satisfactorily producedcommercially and partly because the bare wood was I 48 rapidly mutilatedby the metal clutch segments. Also a metal bushing to withstand thestresses set up by the steel rings cannot be satisfactorily inserted inthe tapered bore.

1 accomplish the desired result in the present instance bya'construction hereinafter do the axis of the spindle. When the s indleblade.

in the bore 10- is positioned a metal bushing scribed, and shown on theaccompanying drawing, in which:

Fig. 1 is an elevation of a centrifugal clutch s indle with a bobbinplaced thereon, the bob in being cross-sectioned -to more clearly showmy invention; I

Fig. 2 is an enlarged sectional elevation of the butt of the bobbinshown in Fig. 1;

\ Fig. 3 is a view similar to Fig. 1 but showingi a different form of myinvention, and

1g. 4 is an enlarged sectional elevation of the butt of thebobbin shownin Fig. 3. I

The spindle illustrated comprises the usual blade 1 with the whirl 2 ri'dly secured thereon, and a centrifugal bo bin clutch 3 which includes aslotted sleeve 4 providing guides for pivotally mounted clutch se ments5 the upper, or exposed, ends of whic mchne upwardly and outwardly awayfrom is rotated the iipper ends of the clutc segments tend to y out awayfrom the blade and this centrifugal action is utilized to drive thebpbbin.

Th s spindle may be, as herein shown, idenheel with that disclosed in myrior Patent No. 1,796,770, granted March 1 1931, and, accordm ly, neednot be further illustrated or descri d. I

The bobbin illustrated in Figs. 1 and 2 includesa barrel portion 6 and abutt portion 7, the barrel portion being bored lon-- 'tudinally as at 8and provided with a metal ushing 9 for cooperation with the spindle Thebutt 7 of the bobbin is provided with an enlarged bore 10 the lowerportion of which houses the centrifugal clutch. With- 11 which, asshown, extends from a int well below the gripping portions of e clutchsegments to a point thereabove, the bushing thereby serving the dualpurpose of protecting the wood of the bobbin from the mutilating actionof the clutch segments and reinforcingthe bobbin against the stressesimparted by the steel rings 12 which fit very tightly on the butt of thebobbin. The bushing is rigidly secured in the bore 10 m any suita lble'manner, as by being spurred to the woo Y I a The bushing 11 is slightlylarger in cliameter, inside, than those usually employed for cooperationwith a given size of obbin clutch, and is provided, approximately midwayof its ends, with, an inwardly. project- I ing, circumferential ledge.The inner edge of this ledge-is of slightly less diameter than theinternal diameter of the bushings used heretofore, and bears against theclutch segments well below their tops. The exact manner of procuringthis ledge is not of primary importance, although I have shown twomethods which I believe to be the best.

'In Figs. 1 and 2 the ledge 13 is constituted f by the upper edge of aninwardly project ing annular flange formed in the bushing 11 before itis inserted in the bore 10.

In Figs. 3 and 4, the barrel 6, butt 7 bore 8, bushing9, bore 10 andrings 12' are identical with the corresponding parts in Figs. 1 and 2.The bushing 11 is likewise identical with bushing 11 except that inbushing 11 ledge 13 is constituted by the upper edge of a shorterbushing 14 inserted within and fixed to the bushing 11' in any suitablemanner as by being spurred thereto. The bushing 14 is approximately halfthe length of the bushing 11 and ledge 13' is,

; accordingly, positioned approximately midwayof the ends of the longerbushing and well below the tops of the clutch segments.

The diameter of the inner edgeof ledge 13, 13 is such that it'will bearfirmly against the clutch segments when the bobbin is down .on thespindle, and the inclined faces of the clutch segments will, when thespindle is be attained in other ways without depart ing from the spiritof the invention as defined in the appended claims, it beingparticularly noted that while I have shown the ledge as being continuousI do not wish to limit myself to such a construction.

Having fully disclosed the two preferred embodiments of my invention Iclaim:

1. The combination of a rotatable spindle having a plurality of clutchseents which incline outwardly and upward yaway from the axis of thespindle, with a bobbin having a metal bushing in a bore in the buttthereengaging the inclined clutch se of, serving to house the clutchsegments, said bushing being provided with an inwardly projectinglocking ledge, of less diameter than the remainder of the bushing, theledge enga ing the: inclined clutch segments below t e tops thereof andlocking the bobbin against rising on the spindle.

2. The combination of a rotatable spindle having a plurality of clutchsegments which incline outwardly and upwardly awa from the axis of thespindle, with a bobbin avin a metal bushing in a bore in the butt thereoserving to house the clutch segments, said bushing being providedintermediate its ends, with a continuous, inwardly projecting, lookingledge of less diameter than the remainder of the bushing, the ledgeengaging the in-' clined clutch segments below the tops thereof andlocking the bobbin against rismg on the spindle.

3. The combination of a rotatable spindle having a plurality of clutchsegments which incline outwardly and upwardly away from the axis of thespindle, with a bobbin avin a metal bushing in a bore in the butt thereoserving to house the clutch segments, said bushing being provided,intermediate its ends, with an inwardly proJecting annular flange, ofless diameter than the remainder of the bushing, the upper edge of theflange the tops thereof and constitutmg a locking member for locking thebobbin against I'IS- ing on the spindle.

4. The combination of a rotatable spmdle having a plurality of clutchsegments which incline outwardly and upwardly away from the axis of thespindle, with a bobbin havin a metal bushing in a bore in the buttthereo said bushing extending from a po nt below the clutch segments toa point thereabove, and a shorter metal bushing positioned withentsbelow in and secured to the first said bushing, tlie top edge of theshorter bushing constituting a circumferential locking1 ledge engagingthe inclined clutch segments elow the tops thereof and locking thebobbin from 11S1l1g on the spindle. k

5. The combination of a rotatable s indle having a plurality of clutchsegments t e exposed portions of which incllne outwardly and upwardlyaway from the axis of the spindle, with a bobbin having a cylindricalmetal bushing secured in a bore in the butt thereof, the top edge ofsaid bushing being continuous and also being smaller in diameter thanthe diameter of a circle defined by the tops of the exposed portions ofthe clutch segments, the said top edge of the bushin engaging beneaththe outwardly incline clutch segments and locking the bobbin down on thespindle.

6. A bobbin for use with rotatablefs indles having locking members,saidib'obbin' aving' a cylindrical bore in the buttthereof,andametaLbusbjnasecured in the said bore, the said bushing ingsubstantially cylindrical and provided, intermediate its ends, with aninwardly pro ectin annula'r'flange the 01:;- 6 per eddge of which angeconstitutes a l mg 1e ge for(en%ain%the locking members ofthialspindleto o d t e bobbin down on the spm e.

7. A bobbin for use with rotatable indies '10 having locking members,said bobbin aving 'a bore in the butt thereof, a metal bushin secured inthe said bore, and a shorter meta bushin itioned within and secured tothe. first sai bushing, the shorter bus fsrminating a substantialdistance below t 0 top of the. first bushing, and the top edge of thesaid shorter bushing constituting a lockin ledge for engaging thelocking members 0 the indle to 01 the bobbin down on the spin e.

. WALI-LACE' I. STIMPSON.

